All Boating Charters
- Seamax
- Seamocean – Jordan Valley
- Seamocean – Rhino Ride Self-drive Speedboat
- Seamocean – Sea Camel Self-drive Speedboat
- Searenity Jetcars Ocho Rios, Jamaica
- Searostrattus
- Seas 2 Trees Outdoors, LLC
- Seas N' Cays Cruises – 42' Summer Wind
- Seas N' Cays – 42' Double Decker Catamaran
- Seas The Adventure
- Seas The Day Boat Tours
- Seas The Day Destiny
- Seascape Algarve – Cranchi Mediterranee
- Seascape Charters
- Seaside Charter Company – Wrightsville Beach
- Seaside Napoli
- Seaspray
- Seaventure Dubrovnik – Cap Camarat 6.5WA
- Seaventure Dubrovnik – Karnic SL 741
- Seawalker Excursions
- Seañorita 43ft Sea Ray Sundancer
- Second Generation Bay Boat Charters
- Second Generation Fishing Charters Key West
- Second Sport Charters
- Secret Cays Bahamas
- Seek N Fishing Charter
- Serenity Boat Charters Malta – Private Tours
- Serenity Charters TCI
- Set Sail Tours
- Seven Day’s Snorkeling
- Seven Star Dinner Cruise
- Shaka in San Carlos
- Shallow Water Experience LLC
- Sharkcana Yachts – Private Yacht Excursions
- Sharky's Charters
- Shark’s Tours
- Shearwater Charters
- Shockwave Charters
- Shoki Charters
- Shooter Dog Cruises
- Shore Service
- Shore Thing Charters OCNJ
- Shore-Thing Charters
- Short Skirts Sportfishing
- Shotime Charters
- SiP Travel – Blue Cave Adventure
- SiP Travel – Boka Bay Tour
- Sicily Fishing Charter
- Sicily Yachting Club
- Sidekick Charters
- Sierra Surf House
- Siesta Cruise Boat Tours
- Siesta Key Snorkel
- Sightseeing, Booze Cruise
- Sightseeing,Booze,Sunset and Lake Boca Cruise
- Sigting by The Arch and SnorkelingTour
- Silver Thatch Watersports – Diver
- Silver Thatch Watersports – MB
- Silver Thatch Watersports – Silver Thatch II
- Silver Tuna Sport Fishing
- Simon Says Charters
- Sin Priza – Snorkeling Tour
- Singing Reel Charters
- Sip N Sea Charters – Fun In The Sun!
- Sip and Sea Charleston
- Sip and Sea Charleston
- Siren – 60' Iconic Luxury Yacht
- Sirena – Splav & Brod
- Sirigos Yachting
- Sisi Boating Experiences
- Six Shooter Charters
- Skadar Lake – Boat Cruise
- Skarpina Budva
- Skinny Dipn Charters
- Skipper Charters
- Skipperdan Boat Ltd
- Skirtchaser Charters
- Skyway Fishing Tours
- SlackTyde Charters
- Slick Calm Charters
- Smile Boats – Kattum K30
- Smokin Hooks
- Smooth Sailing Of Miami
- Snap Decision Charters
- Snorkel/Shelling Eco Tour
- Snorkeling Trip With Tamarindo Surf & Tours
- Snorkeling With Sea Turtles
- SoFlo Charters
- SoMax Fishing
- Soleil Sport Fishing – Boat Tours
- Solevela Yacht Charter
- Solmar Aegina Villa & Yacht
- Solo Good
- Solé Watersports – Private Tour: Up to 24
- Something Fishy Charters
- Sorrento Sea Service – Siren
- Sorta Salty Charters
- Soundside Tours
- South Cruise Adventures
- South Flow Charters